Adjustable arm cradle



FIG. 1 is a perspective view, taken from the front and right side of my adjustable arm cradle showing my new design;

FIG. 2 is a left side elevational view;

FIG. 3 is a rear elevational view;

FIG. 4 is a bottom plan view; and,

FIG. 5 is a top plan view. 

The ornamental design for an adjustable arm cradle, as shown and described. 